The rules for finding the least common denominator are clearly explained at this website. Two different methods are given. This is an excellent place to get step by step explanations for working with fractions.

[Free Registration/Login may be required to access all resource tools.] In this learning module, students must find the least common denominator for the fractions they are presented with. Includes video demonstrating a sample problem...

Find a quick, concise explanation of how to find the least common denominator for fractions or rational expressions. Examples are given and clearly explained.

Brush up on your math skills relating to the least common multiple then try some practice problems to test your understanding.

[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to compare fractions in word problems and determine which is bigger or smaller. Includes video demonstrating a sample...

Students watch a video lesson about comparing fractions with unlike denominators. The tutorial includes an example using common denominators.

Students review how to compare fractions with unlike denominators. The video tutorial includes detailed examples.

This is an excellent resource to visually illustrate adding and subtracting fractions by finding the lowest common denominator.

The learning activity examines the least common denominator. Topics include fractions with denominators, common denominators, and the least common denominator. The resource consists of images, explanations, examples with solutions, and a...

[Free Registration/Login may be required to access all resource tools.] Compare fractions using lowest common denominators.

[Free Registration/Login may be required to access all resource tools.] In this learning module, students must find the least common denominator of two fractions in order to subtract one from the other. Includes video demonstrating a...

Practice rewriting fractions to have the same denominator. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to compare fractions with different denominators and put them in order. Includes video demonstrating a sample problem...

Demonstrates how to add and subtract fractions where the denominators are different. Includes sample problems to try.

[Free Registration/Login may be required to access all resource tools.] Order fractions from least to greatest and greatest to least using lowest common denominators.

Part (a) of this task asks students to find and use two different common denominators to add the given fractions. The purpose of this question is to help students realize that they can use any common denominator to find a solution, not...

Part (a) of this task asks students to use two different denominators to subtract fractions. The purpose of this is to help students realize that any common denominator will work, not just the least common denominator. Part (b) does not...

Definitiion of a common denominator with examples.

A graphing calculator lesson focusing on common denominator. Lesson contains detailed examples, visual demonstrations with key functions, and practice problems. Acrobat Reader required.

[Free Registration/Login may be required to access all resource tools.] Evaluate numerical expressions with fractions by renaming multiple terms with a lowest common denominator.

Students add and subtract fractions using a common denominator.

[Free Registration/Login Required] This flipchart presents a method for finding the common denominator of fractions.

[Free Registration/Login may be required to access all resource tools.] In this learning module, students solve word problems where they must add and subtract fractions with different denominators. Includes video demonstrating a sample...

[Free Registration/Login may be required to access all resource tools.] In this learning module, students add and subtract three fractions with different denominators. Includes video demonstrating a sample problem [2:41] and a set of...